Turbine.



No. 835,472. l I PATENTE) Nov. 6, 1906.

LLLLLLLLLLLLLLLLLLLLLLLLLL 6.

UNITED STATES PATENT oEEioE.

MAXROTTER, `OF MILWAKEE, WISCONSIN-'ASSIGNOR'TO ALLIS- CHALMERS COMPANY, OF MILWAUKEE, WISCONSIN, A CORPO- EATIoN or NEW JERSEY.`

TURB'INE.

` Nasse-172.

Specification of Letters Patent.

Patented Nov. 6, 1906.

Application filed July 12, 1906. Serial No. 325.746.

A ication AThis invention relates to turbines, and more speciiically to the type known as elastic-fluid turbines; and it comprises means for securing the blades to the blade-holding members.

In the accompanying drawings, which illustrate an embodiment of the invention andwhich are to be considered as apart of this specification and in Which-the same reference characters are used to designate the same elements in each of the several views, Figure 1 represents in section the blade-holding elements and a blade in its prper'relation thereto. Fig. 2 is a fragmentary elevation of a blade as seen looking in the direction indicated by the arrow on Fig. 3. Fig. 3 is a plan view of a blade. Fig. 4 is a plan view of the retaining-ring, and Fig. 5 is a sectional view of the retaining member, taken' onthelineaaofFigA. Y

The reference character M designates a blade-holdin member, which is shown as provided wit an undercut recess similar to an ordinary form of dovetailed slot.

Reference character R represents a bladeretaining member which is adapted'to be seatedin the recess of the `blade-holding member. This bladeretaining member R is formed with a recess, as shown at s, on its lower surface, and on its upper surface is formed a lurality of slots g g, which slots ate exten ed through one 'side of said member, so that they communicate with the recess, as clearly illustrated by Figs. 4 and 5.

Reference character B represents a blade which is rovided with the root r and the oHset or gent-over portion F. The blade is provided with shoulders f h, which are adapt-- ed to rest in one of the grooves g When'the root of the blade is inserted in'said groove y with the oiiset or bent-over portion F hooked under said member and lying in the recessed portion thereof. t Y

Reference character l) re resents a holdingstrip, which adapted to ook the blade B to the member R and retain the blade B and member R within theundercut recess of the blade-holding member M. While this holding-strip may be dispensed with it facilitates the assembling of the parts under certainv conditions.

T 4 blade-retaining member R formed wit ,its base and one side disposed at an acute angle to t theundercut recess of the blade-holding member, and the grooves -g and recess sare so disposed and formed that the solid portions T at the bottoms of the grooves g' project to form a dovetail lock t for the blades,which are correspondingly recessed at bf, as clearly shown by Figs. '1 and 5 of the drawings. By this construction the blades may be readily and securely fastened to the blade-holding member.

What I claim isy 1. The combination with a blade-holding member provided with a recess of a bladeretaining member seated in said recess, said blade-retaining member being provided with arecess and a locking portion and a blade provided with an offset portion and a recess vto coact with 'the recess'and locking'portion of said retaining member respectively.

`2. The combination with a blade-holding member provided with: a recess of a bladeretaining member seated in said recess, said blade-retaining member being provided with a recess .and a locking portion and a blade provided with an oi'lset portion and a recess to coact with the recess and locking portion of said retaining member respectively, and means for securing said blade and retaining member in the recess of said blade-holding member.

3. The combination withthe blade-holdy ing member provided with arecess of the blade-retaining member R recessed ats and provided with slots g, and the blade B provided with the oset portion F.

4. The combination with the blade-hold- "ing member provided with a recess of the blade-retaining member R recessed at s and provided with slots g, the blade B provided with the offset ortion F, and means for securing said bla e and blade-retaining mem- Eer in the recess of said blade-holding mem- 5. The combinationwith the blade-hold` IOO ing member provided With arecess of a bladeing member in the recess of seid blede-vhold- |o retaining member seated in said recess, seid ing member. blade-retaining member being provided with yIn testimony whereof I affix my signature a groove on its outer surface and also being in the presence of two Witnesses.

i recessed, a blade adapted to encrage with the Y groove and provided with an fset portion MAX ROTTER' to engage with the recessed portion of said Witnesses: ,Y blade-retaining member respectively, and FRANK E. DENNETT, means to secure seid blade and blade-retan- G. F. DE WEIN. 

